A complaint letter gives you a way to explain a problem, provide relevant evidence and ask for a practical resolution. Whether you are dealing with a faulty product, an unsatisfactory service, a delayed delivery or an unresolved administrative issue, clear written communication can help the recipient understand your concerns and decide what to do next.

In Australia, complaints may involve businesses, service providers, landlords, property managers or public organisations. Although the details vary, the principles of effective complaint writing remain similar: describe what happened, explain why it is a problem, state what outcome you are seeking and maintain a professional tone throughout.

A strong complaint letter does not need complicated language or aggressive demands. It needs accurate information, a logical structure and a reasonable request.

1. Identify the Correct Recipient

Before drafting your letter, find out who is responsible for handling the complaint. Depending on the situation, this could be a customer service department, complaints officer, business manager, property manager or another relevant contact.

Check the organisation’s website, previous correspondence, invoice or agreement for contact details. Some organisations publish a specific complaints procedure, including the information they need and the appropriate submission method.

Addressing the right person helps your complaint reach the team best placed to investigate it. If you cannot find a named contact, use a professional greeting such as “Dear Customer Service Manager” or “Dear Complaints Team”.

Include your name and preferred contact details. Where relevant, add an order number, invoice reference, account number or case reference so the recipient can identify the matter quickly. Avoid including sensitive personal information unless it is necessary for handling the complaint and the communication channel is appropriate.

2. Write a Specific Subject Line

A clear subject line summarises the issue before the recipient reads the letter. It should be brief, informative and relevant to the complaint.

For example:

• Complaint about a damaged dining table delivered on 14 October
• Request for review of an incorrect electricity bill
• Formal complaint regarding a missed repair appointment
• Follow-up on unresolved customer service complaint, reference 45821

Avoid vague headings such as “Problem” or “Very disappointed”. They do not explain what the correspondence concerns and may make it harder to locate later.

If you have already contacted the organisation, refer to the earlier complaint or case number. This establishes continuity and reduces the chance of your message being treated as an unrelated enquiry.

3. Describe What Happened Clearly and Factually

The main body of the letter should explain the problem without unnecessary emotion or speculation. Start with a short statement of your concern, then provide the relevant details in chronological order.

Depending on the situation, explain:

• What you purchased, booked, requested or agreed to.
• When and where the relevant event occurred.
• What went wrong or differed from what was agreed.
• When you first noticed the problem.
• What communication has already taken place.
• Whether the issue remains unresolved.

Specific information is more useful than sweeping accusations. For instance, writing “Your company has completely ignored me” does not tell the recipient when you made contact or what response you received.

A more useful description would be:

“I paid $240 for washing machine installation on 8 October. The appointment was confirmed for 12 October, but no technician attended. I contacted customer service on 13 October and was advised that the matter would be reviewed. As of 20 October, I have not received a new appointment date.”

This version gives the recipient dates, an amount, the service involved and the history of the complaint. It also avoids guessing why the appointment was missed.

If you are unsure about a detail, do not present it as a confirmed fact. Explain what you observed and distinguish it from what you were told or what you believe may have happened.

4. Explain How the Problem Has Affected You

After describing the events, briefly explain their practical consequences. This helps the recipient understand why the matter needs attention.

For example, a delayed delivery may have disrupted a planned move. A faulty appliance may be unusable. An incorrect bill may have made it difficult to understand the amount being charged.

Keep the explanation relevant and proportionate. If you paid for an alternative service or incurred an additional expense, state the amount and explain its connection to the problem. Retain receipts or other records that support the information.

You do not need to describe every inconvenience or repeat the same point several times. Focus on the effects that help explain your requested resolution.

5. State the Outcome You Want

A complaint letter should make it clear what you would like the recipient to do. Without a specific request, the organisation may understand that you are unhappy but remain uncertain about how you want the matter resolved.

Depending on the circumstances, you might request:

• A repair or replacement for a faulty item.
• A review of an invoice or disputed charge.
• Completion or correction of a service.
• Information about available refund options.
• A written explanation of a decision.
• A review of the handling of an earlier complaint.

Whenever possible, state your preferred outcome directly. If you are open to alternatives, mention that too.

For example:

“I would appreciate a replacement for the damaged item. If a replacement is unavailable, please explain the refund options available in these circumstances.”

Your request should reflect the facts and the relevant circumstances. Australian consumer protections and other applicable rules may affect the options available, but a complaint letter does not guarantee a particular outcome. Where the matter involves specific rights or deadlines, consult an appropriate official source or qualified adviser.

6. Include Supporting Documents

Evidence can make a complaint easier to assess. Include relevant documents that help establish what happened and support your request.

Useful material may include:

• Receipts and invoices.
• Order confirmations or booking records.
• Photographs of damage or defects.
• Copies of earlier emails and letters.
• Relevant contract or warranty information.
• Service reports or records of additional expenses.

Refer to each attachment in the letter so the recipient knows why it is included. For example:

“I have attached the purchase receipt dated 5 October and photographs showing the damage noticed when the item was delivered.”

Send copies rather than irreplaceable originals unless the organisation specifically requires otherwise. Keep your own records of everything submitted, including the final letter and any acknowledgement.

Avoid sending unrelated documents or unnecessary personal information. Well-organised evidence is more helpful than a large collection of material that does not directly support the complaint.

7. Maintain a Professional Tone

It is understandable to feel frustrated when a problem has not been resolved. However, a calm and respectful letter helps keep attention on the issue and the action you are requesting.

Use plain English, short paragraphs and direct sentences. Avoid insults, personal attacks, exaggerated accusations or threats. If you disagree with a decision, explain why and identify the relevant facts.

Compare these two approaches:

Less effective: “Your staff are incompetent, and I demand that you fix this immediately.”

More effective: “The issue remains unresolved despite my earlier enquiry. Please review the information provided and advise how you propose to address the matter.”

The second version is firm without becoming hostile. It also gives the recipient a clear action to consider.

Before sending the letter, check spelling, grammar, dates, amounts and names. Remove repetition and ensure the requested outcome is easy to identify.

If you need help with the format, reviewing relevant sample letters can provide useful examples of how to organise formal correspondence. Adapt any example to your circumstances rather than copying details that do not apply.

8. Request a Response Within a Reasonable Time

A response timeframe helps communicate when you would like an update. Choose a period that is reasonable for the nature and complexity of the complaint.

For example:

“Please provide a response within 10 business days of receiving this letter, outlining the next steps for addressing the issue.”

This is a requested timeframe, not a universal legal deadline. If the organisation publishes its own complaint-handling timeframes, take them into account. If a specific legal, contractual or formal deadline may apply, verify it independently.

Avoid setting an unrealistic deadline simply to express frustration. A clear, reasonable request is more practical and gives both parties a point from which to follow up.

9. Keep Records and Follow Up

Once the complaint has been sent, save a copy of the letter, supporting documents and any delivery confirmation. Record when you submitted it and keep subsequent responses together.

If you discuss the issue by telephone, make a brief note of the date, the person you spoke with, the main points discussed and any agreed next steps. This can help you refer accurately to the conversation later.

If the requested response period passes without an update, send a concise follow-up. Refer to the original complaint, state when it was submitted and ask for an update.

If the organisation does not resolve the issue, check whether it has an escalation process. Depending on the matter, a relevant consumer agency, industry ombudsman or dispute-resolution service in your state or territory may be able to explain the available options. The appropriate organisation depends on the subject of the complaint.

Example of an Effective Complaint Letter

The following fictional example shows how these principles can be combined.

Jordan Smith
15 Example Street
Melbourne VIC 3000
jordan@example.com

21 October 2026

Customer Service Manager
Example Home Appliances

Subject: Complaint about a faulty kettle purchased on 5 October

Dear Customer Service Manager,

I am writing about an electric kettle purchased from your online store on 5 October 2026. The order number is EH12345, and the purchase price was $89.

The kettle arrived on 8 October. When I attempted to use it according to the supplied instructions, it repeatedly switched off before heating the water properly. The problem has continued each time I have tried to use the product.

I contacted your customer service team by email on 10 October and received an acknowledgement, but I have not yet received information about how the issue will be addressed.

I would appreciate a replacement kettle or information about the available refund options. I have attached a copy of the purchase receipt and a photograph of the product label to help identify the item.

Please respond within 10 business days to confirm the next steps. I would prefer to resolve the matter directly with your team.

Thank you for your attention. I look forward to your response.

Yours sincerely,

Jordan Smith

Attachments: Purchase receipt and product-label photograph

This letter works because it identifies the transaction, explains the fault, records previous contact, includes relevant evidence and states a clear requested outcome. Its tone remains professional, and it does not assume that the recipient must agree to a particular remedy.

Final Checklist Before Sending

Before sending your complaint letter, confirm that you have:

• Addressed the correct person or department.
• Included an informative subject line and relevant reference numbers.
• Described the events accurately and in a logical order.
• Explained the practical impact of the problem.
• Stated the outcome you are seeking.
• Attached relevant supporting evidence.
• Used clear, professional language.
• Requested a reasonable response timeframe.
• Kept copies of the letter and all supporting documents.

A well-prepared complaint letter cannot guarantee that a dispute will be resolved in your favour. It can, however, make your concerns easier to understand, help the recipient assess the available information and establish a useful written record.

By focusing on facts, evidence and a clear request, you can approach complaints more confidently and make it easier to determine the appropriate next step if the matter remains unresolved.